William s



tant nthj` time.

SHAFT-CDUPLING.

The Schedule :diei-red to in these vLettera Patent and making part of the same.

To all whom tt 'ma/y conce/rn:

-Be it known that I, WILLIAM S. MCKINNEY, of Cincinnati,rHamilton county, State of Ohio, have invented a certain new and useful Improvement in -Shaft- Oouplings; and I dophereby declare the following to be a full, clear, and lexact description thereof, reference being had to the accompanying drawings, making part of this specification. h

My invention ,consists of a coupling, in'I which the ends of the shafts to be connected are confined and properly secured by a common key seated in the coupling, and a peculiarly-constructed double-draught key or gib, the latter being fitted into match-key seats in the ends of the shafts.

lIn the accompanying drawings- Eigure l represents detached views of the coupling, and the ends of the shaft to be coupled.

Figure 2 is a longitudinal section ,of the shafts and vcoupling connected.

A and B represent the ends of the two shaftsl to be coupled., y f l A coupling or sleeve, C, is bored out to t the shafts A and B, and is turned crowning so that it may serve as -a pulley, when required.

v The sleeve O is key-seated at c, and. is drilled and tapped at c for the insertion of a set-screw, E. F is an ordinary single-draught key, adapted to fit into the seat c, and constructed of a length to match the sleeve O.

G is a double-draught key or gib, constructed .as

shown, with two opposing inclines g y. This key or -gib is of the same length as the key F, and, when in place, enters slightly into the seat c, as seen in fig. 2. The key is also fitted into key-seats in' the 'shafts to be coupled, the seats being indicated bythe letters H and I in both the gures.

match the double incline ofthe key or gib Gr.

When the shafts are coupled, as in iig. 2, the setscrew E may be inserted in the sleeve O, if deemed necessary, to prevent the key F from Working loose.

It will b e observed that in this coupling there are no projecting bolts, keys, orl set-screws to entangle loose belts or the clothing of attendant operatives, and that while it is perfectly effective in resisting all possible strains to which the shafting may be subjected, it is exceedingly simple in construction, and adapted to be speedily coupled and uncouple'd.

In the operation of coupling, the shafts are brought together, the key-seats H I in line. The key or gib G is then droppedin, the coupling or sleeve G slipped over, and the key F driven in ush with the face of the sleeve. j

Where this coupling is used there is n0 necessity of disturbing an entire line of shafting in order to take out only a section, as is the case with some of the most approved couplings in use.'

I claim herein as new, and of my invention- In the'described combination, with"the key-seated sleeve O and common key F, the double-draughtkey or gib Gr, constructed with opposing inclined faces g g', to fit into match-key seats H I in the shafts, 'substantialiy in the manner and for the purpose set forth.

In testimony of which invention, Ihereunto set my hand.

WM. vS. MGKINN EY.

Witnesses GEO. W. BAKER, THEO. H. AMES. 

